Cloth cutting machine standard protector



Junk: 6, 1939. 5 $M|TH 2,161,103

CLOTH CUTTING MACHINE STANDARD PROTECTOR Filed Sept. 27, 1938 2 Sheets-Sheet 1 INVENTOR ATTOR N EYS June 6, 1939. F. s. SMITH CLOTH CUTTING MACHINE STANDARD PROTECTOR Filed Sept. 27, 1938 2 Sheets-Sheet 2 ATTO R N EYS Patented June 6, 1939 UNITED STATES PATENT OFFICE CLOTH CUTTING MACHINE STANDARD PROTECTOR Francisco Sivila Smith, Mayaguez, P. R. Application September 27, 1938, Serial No. 232,004

3 Claims. (01. 51-274) My invention relates to cloth cutting machines Figure 1 is a perspective view of a cutting maof the type having a reciprocal cutting knife, and chine having my invention applied thereto. more particularly to an appliance especially'de- Figure 2 is a front elevation of my invention. signed for protecting the standard and the knife Figure 3 is a side elevation thereof. guard of these machines and for other purposes Figure 4 is a top plan view of my appliance. 5 mentioned hereinafter. Figure 5 is a sectional View taken on the line Such cloth cutting machines are characterized 5-5 of Figure 3. by the provision of a flat base carrying a narrow F gu e 6 is a S de e va o Of y vent o upright standard which in turn carries a motor p t y n Sect on illustrating the same in assoand other operating parts including a I'Eciprocaciated relation with the standard of a cloth cut- 10 ble cutting knife operated by the motor and slidg m ch ne. able in a slotway in the standard. During the Figure 7 S a front elevation o u e cutting operation the fabric or material to be F r 8 is a e ail sectional view taken on the cut in layers of various thickness is cut vertiline of Figure cally by the reciprocating knife, the tapered side y new and useful appliance is Well adapted 15 of the standard engaging the parted portion of for use With y 010th Cutting machine of the the fabric and tending to slightly spread the Vertical knife type, that in Which a r c y same. Due to the high speed of the knife and reciprocating Cutting knife S e p yed. F0 the nature of the work, it is necessary to frethe purpose of illustration I have shown briefly quently sharpen the knife so that quick and in the drawings a conventional form of such a 20 curate cutting may be performed. It is t cloth cutting machine, which, as will be noted practice to sharpen the knife without removing by reference to Figure des a f at base 3 it from th hi by employing an abrasive to which is centrally and rigidly secured a narelement in the form of an emery or carborundum TOW upright Standard 4 formed on the'upper end 7. stick, the operator standing in front of the mathereof with flange 5 to which is Secured by 25 hi and making forward and downward means of front and rear screws 1 and 8 respecstmkes on each Side of t knif During this tively a motor 9 adapted to reciprocate through sharpening operation, the emery stick enga the agency of a housed connection (not shown) the side of the standard and in a comparatively Cuthng knife Which is guided a its rear short time the standard becomes roughened and edge h Slot/Way in the standard In use e 30 worn, thus impairing the cutting operation and machine rests upon a cutting table and the 0pin the course of usage causes the standard to erator grasping the handle moves Slides become so Worn that it must be replaced by a the machine about upon the table so as to out a new lay of fabric or any material disposed between In my invention I have aimed, primarily to the base 3 and knife guard ll according to any 35 obviate these objections ensuing from the sharp- Sharpe or deslgh desired- It is to be understood ening operation, by the provision of a ne and that the knife is reciprocated at a very high speed useful appliance of simple and inexpensive condunhg the cuthhg ophratioh' It W111 be noted struction, which will preclude any destroying efthat the Stahdard whlch of necessity m be 40 feet upon the standard and will enable the knife compa'muvety narrow In order not to a the 40 to be sharpened at a more proper and accurate parted portlons of E cloth too much 18 the cutting angla sole means of support for the motor and operat- Another Object of my invention is to provide mg parts, and therefore, rigidity of the standard is s 1. an appliance of the character described capable 21312;: of the frequent need for Sharpening of being readily attached to and detached from the knit eitisfoundmst the cutting machine and which is simple in conan emery or carbomndlfm 2232 5 3 fig j structlon h t m emcleht m operation cated diagrammatically by reference character angtgeonegi ta h mamlfatctule- S in Figure 4) as the abrasive element or tool. er o 366 s and ages W111 be apparent During the sharpening operation in which the 50 from the follow g description, appended Claims operator stands in front of the machine and and annexed drawings. moves the emery stick in downward and forward Referring to the drawings wherein like refstrokes along the sides of the knife, the tool also erence characters designate like parts throughbears against the sides of the standard, this out the several views: being inevitable, because the tool must engag 55 the knife at the proper angle. The wearing effect of the tool upon the standard soon so roughens the same as to impede the standard in its passage between the fabric, so that the cutting machine cannot be operated with the ease and facility that it should. Furthermore, during a comparatively short time with regard to the life of a machine of this character the standard will become so worn and cut away at its front and side edges as to render it an unstable means of support, consequently requiring the substitution of a new standard.

By means of the improvements which my invention provides the effects following the frequent sharpening of the cutting blade as mentioned are entirely avoided, and in addition, several distinct advantages are gained. My improvement consists in providing a protective device or guard adapted to be detachably secured to the standard so as to fully cover the sides of the same while exposing the blade for sharpening. Thus the cutting knife may be sharpened and there will be no destructive wear upon the standard as the same is wholly protected by the protective device or guard. This device in addition to serving as a protective means also forms a guide for the sharpening element in that by bearing the element against rotatable means on the guard the element will engage the knife at the proper angle so as to insure an even, accurate cutting edge.

By thus protecting the standard, the sides thereof will soon acquire a smooth and highly polished surface by contact with the'fabric during the cutting operation, and as a consequence the cutting machine may be moved through the lays with increasing ease and facility and with greater accuracy and less effort on the part of the operator.

In furtherance of the foregoing I have provided as illustrated in the drawings a protective guard and sharpening guide comprising an elongated vertically extending member I5, the front face 16 thereof engaging the rear face of the standard A and said member is provided on the lower end thereof with a pair of spaced forwardly extending arms I! having seating engagement with the upper face of the base 3 of the machine and which embraces the sides of said standard. The upper end of the member I5 is likewise formed with a pair of spaced forwardly extending arms l8 embracing the sides of the standard and between which is pivotally mounted one end of a lever IS.

The lever 59 is formed above said end with an arcuate shaped section for receiving between the ends thereof the rear screw 8 and which coacts with the upper faces of the arms l8 (which engage the screw 7) to support said member fixed between said flange 5 and base 3. The upper end of the member 15 is provided with a socket 26 in which is seated the lower end of a coil spring 2 i, the upper end engaging the under face of the lever l5 and normally urging said lever upwardly into engagement with the screw 8. A scr w 22 is mounted in said lever and extends downwardly therethrough between the convolutions of the spring 2! whereby to maintain said spring against displacement relative to the lever H9. The opposite end of the lever is formed with a finger piece 24 whereby said lever may be actuated downwardly against the tension of the spring todetach the same from the screw 8 and permit removal of the device from the machine. The outer ends of the arms I! and I8 are disposed laterally of the sides of the standard 4 and inwardly of the cutting edge of the knife 9 and have rotatably mounted therebetween vertically disposed rollers 25.

The ends of the rollers 25 have journaled therein the reduced ends of adjusting screws 26 mounted in the respective ends of the arms I! and I8 as clearly illustrated in Figure 3 of the drawings.

From the foregoing it will be apparent that when the member I5 is inserted between the base 3 and flange 5, the rollers will be disposed on each side of the cutting blade 9 and when a sharpening tool is operated on the angular cutting edges said tool will engage the rollers and preclude engagement of the tool with the standard 4 thereby protecting the latter. Also, the rollers 25 serve to effect positioning of the tool S at a proper angle relative to the cutting edge 9 and thereby effect an even sharpening of the cutting edges.

From the foregoing it will be apparent that I have provided a simple and efficient appliance adapted to be readily attached and detached from cloth cutting machines whereby to serve as a guard for the standard thereof and to effect a proper sharpening of the knife.

It is to be distinctly understood that various changes and modifications in the construction and arrangement of the parts may be resorted to without departing from the spirit of the invention or scope of the appended claims.

What I claim is:

1. A device for facilitating the sharpening of the knife of a cloth cutting machine without dismounting said knife, comprising, an elongated channeled member adapted to embrace the standard of said machine and fashioned with pairs of upper and lower forwardly extending spaced arms adapted for connection with said machine, spring pressed means mounted on the upper end of said member and engaging said machine for effecting detachable connection of said member to said machine, spaced rollers rotatably mounted between said pairs of arms and adapted for lateral, positioning in relation to ths knife of said machine and coacting with said knife to maintain a grinding tool spaced from said standard during the sharpening of said knife.

2. A device for facilitating the sharpening of the knife of a cloth cutting machine without dismounting said knife, comprising, an elongated channeled member adapted to embrace the standard of said machine and fashioned with pairs of upper and lower forwardly extending spaced arms adapted for connection with said machine, a spring pressed lever mounted on the upper end of said member and engaging the upper end of said standard of said machine for effecting detachable connection of said member to said machine, spaced rollers rotatably mounted between said pairs of arms and adapted for lateral positioning in relation to the knife of said machine and coacting with said knife to maintain a grinding tool spaced from said standard during the sharpening of said knife.

3. A device for facilitating the sharpening of the knife of a cloth cutting machine without dismounting said knife, comprising, a member adapted to embrace the standard of said machine, and spaced rollers rotatably carried by said member and adapted for lateral positioning in relation to said knife and coacting with the latter to engage a grinding tool and maintain said tool spaced from said standard during the sharpening of said knife by said tool.

FRANCISCO SIVILA SMITH. 

